Ricochet

(rĭk′/o-shā′, or rĭk′/o-shēt/) (Synop., § 130), n. [Fr., a rebounding, as of some flat substance striking on the surface of water.]

1. Rebound or skipping, as of a ball fired at a low angle of elevation.
2. (Gun.) The firing of guns, or howitzers, usually with small charges, and elevated a few degrees, so as to cause the balls or shells to rebound or roll along the ground on which they fall.

This is called ricochet firing, and the batteries are called ricochet batteries.